SPIRIT offers an ITU G.168-compliant Line Echo Canceller (LEC) designed to
eliminate electric (also known as hybrid) echo created by the electrical circuitry
connected to the wire lines.
SPIRIT LEC (G.168-2004) is to be embedded into multi-channel infrastructure
hardware such as IP or Frame Relay gateways. Low MIPS consumption allows
to increase the number of channels processed by one chip. SPIRIT Network
LEC provides a considerable cost-effectiveness in comparison with the existing
hardware solutions. The canceller's design makes it possible to independently
set up the balance between MIPS consumption and echo path tail for each
channel, without any code modification.
Features
Very low MIPS and memory requirements
Well suited for T1/E1 lines
Automatic echo tail search
Maximum compensated echo path can be set to 16, 32, 64 or 128 ms
Convergence monitor
Robust double talk detector and non-linear processor
Comfort noise generator with adaptation to background noise level
No divergence during double talk and narrow-band signals
Passes ITU G.165 tests 1-6, and ITU G.168-2004 tests 2A, 2B, 2C, 3A, 3B, 3C, 4, 5, 6, 7; eXpress DSPT Compliant. Code is reentrant, supports multithreading and dynamic memory allocation. At the same time allows direct (non-eXpressDSP) interface to enable static memory allocation
